dt-bindings: display: rockchip: Add schema for RK3588 DW DSI2 controller

The Display Serial Interface 2 (DSI-2) is part of a group of communication
protocols defined by the MIPI Alliance. The RK3588 implements this
specification in its two MIPI DSI-2 Host Controllers that are based on a
new Synopsys IP.

Tested-by: Dmitry Yashin <dmt.yashin@gmail.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Heiko Stuebner <heiko.stuebner@cherry.de>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20241209231021.2180582-3-heiko@sntech.de

Documentation/devicetree/bindings/display/rockchip/rockchip,rk3588-mipi-dsi2.yaml

@@ -0,0 +1,120 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/rockchip/rockchip,rk3588-mipi-dsi2.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip specific extensions to the Synopsys Designware MIPI DSI2
+
+maintainers:
+  - Heiko Stuebner <heiko@sntech.de>
+
+properties:
+  compatible:
+    enum:
+      - rockchip,rk3588-mipi-dsi2
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: pclk
+      - const: sys
+
+  rockchip,grf:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      This SoC uses GRF regs to switch between vopl/vopb.
+
+  phys:
+    maxItems: 1
+
+  phy-names:
+    const: dcphy
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  reset-names:
+    const: apb
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Input node to receive pixel data.
+
+      port@1:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: DSI output node to panel.
+
+    required:
+      - port@0
+      - port@1
+
+required:
+  - compatible
+  - clocks
+  - clock-names
+  - rockchip,grf
+  - phys
+  - phy-names
+  - ports
+  - reg
+
+allOf:
+  - $ref: /schemas/display/dsi-controller.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/rockchip,rk3588-cru.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/phy/phy.h>
+    #include <dt-bindings/power/rk3588-power.h>
+    #include <dt-bindings/reset/rockchip,rk3588-cru.h>
+
+    soc {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      dsi@fde20000 {
+        compatible = "rockchip,rk3588-mipi-dsi2";
+        reg = <0x0 0xfde20000 0x0 0x10000>;
+        interrupts = <GIC_SPI 167 IRQ_TYPE_LEVEL_HIGH 0>;
+        clocks = <&cru PCLK_DSIHOST0>, <&cru CLK_DSIHOST0>;
+        clock-names = "pclk", "sys";
+        resets = <&cru SRST_P_DSIHOST0>;
+        reset-names = "apb";
+        power-domains = <&power RK3588_PD_VOP>;
+        phys = <&mipidcphy0 PHY_TYPE_DPHY>;
+        phy-names = "dcphy";
+        rockchip,grf = <&vop_grf>;
+
+        ports {
+          #address-cells = <1>;
+          #size-cells = <0>;
+          dsi0_in: port@0 {
+            reg = <0>;
+          };
+
+          dsi0_out: port@1 {
+            reg = <1>;
+          };
+        };
+      };
+    };